a yellowish crystalline heterocyclic compound used as a fungicide; benzo-1,4-pyran. Its molecular structural unit is found in many dyes, such as rhodamine and fluorescein. Formula: CH2(C6H4)2O
xanthene in American English
(ˈzænˌθin)
noun
a ring system, C6H4CH2OC6H4, occurring as yellowish, crystalline leaflets in the molecules of many dyes